Malicious PDF — malware analysis report

Static analysis result for SHA-256 5213f159fef1268b…

MALICIOUS

PDF

48.4 KB Created: 2021-05-11 08:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df50d5b7317b1dae3ef2a991c8487a31 SHA-1: 69f4da2434d4dda69b06347623eb2936ac9778ce SHA-256: 5213f159fef1268bd6c2c9a6dd29fcf0c42f3fb13f4d7660c4aceeb7860591c8
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized PDFs designed to lure users with promises of game hacks and free in-game currency. The document body and heuristics indicate a 'game hack redirector' and a 'link farm' strategy, suggesting the primary goal is to drive traffic to malicious or scam websites. The presence of a password protection lure suggests an attempt to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/hacks-para-roblox-game-hack PDF link annotation
    • http://www.pro-futuro.eu/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.pro-futuro.eu/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4962 31580 bytes
SHA-256: 6e93ca0d479835e53020e6748d072512063ef805d757a38a5cc93af81fd7ad3c
font_01_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 3948 bytes
SHA-256: f7f039bd6d2a9c0de236804614c0271c153d749b32fc81fde8398560ffc04b8e
font_02_sfnt_off00009abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABB 18336 bytes
SHA-256: 2c3591d0816fe2ec07885ff461cab1f1278707ef551a51e26631ad2b93349e2a

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